dom-class.js revision 11d9dd8b82b5c2d342e8ed987c9da6f691e2beb9
var addClass, hasClass, removeClass;
Y.mix(Y.DOM, {
/**
* Determines whether a DOM element has the given className.
* @method hasClass
* @for DOM
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to search for
* @return {Boolean} Whether or not the element has the given class.
*/
hasClass: function(node, className) {
var re = Y.DOM._getRegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
return re.test(node.className);
},
/**
* Adds a class name to a given DOM element.
* @method addClass
* @for DOM
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to add to the class attribute
*/
addClass: function(node, className) {
if (!Y.DOM.hasClass(node, className)) { // skip if already present
node.className = Y.Lang.trim([node.className, className].join(' '));
}
},
/**
* Removes a class name from a given element.
* @method removeClass
* @for DOM
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to remove from the class attribute
*/
removeClass: function(node, className) {
if (className && hasClass(node, className)) {
node.className = Y.Lang.trim(node.className.replace(Y.DOM._getRegExp('(?:^|\\s+)' +
className + '(?:\\s+|$)'), ' '));
if ( hasClass(node, className) ) { // in case of multiple adjacent
removeClass(node, className);
}
}
},
/**
* Replace a class with another class for a given element.
* If no oldClassName is present, the newClassName is simply added.
* @method replaceClass
* @for DOM
* @param {HTMLElement} element The DOM element
* @param {String} oldClassName the class name to be replaced
* @param {String} newClassName the class name that will be replacing the old class name
*/
replaceClass: function(node, oldC, newC) {
//Y.log('replaceClass replacing ' + oldC + ' with ' + newC, 'info', 'Node');
removeClass(node, oldC); // remove first in case oldC === newC
addClass(node, newC);
},
/**
* If the className exists on the node it is removed, if it doesn't exist it is added.
* @method toggleClass
* @for DOM
* @param {HTMLElement} element The DOM element
* @param {String} className the class name to be toggled
* @param {Boolean} addClass optional boolean to indicate whether class
* should be added or removed regardless of current state
*/
toggleClass: function(node, className, force) {
var add = (force !== undefined) ? force :
!(hasClass(node, className));
if (add) {
addClass(node, className);
} else {
removeClass(node, className);
}
}
});
hasClass = Y.DOM.hasClass;
removeClass = Y.DOM.removeClass;
addClass = Y.DOM.addClass;